mk_alt data_con bndrs body = (DataAlt data_con, bndrs, body)
+buildToArrPRepr :: Shape -> TyCon -> TyCon -> TyCon -> VM CoreExpr
+buildToArrPRepr _ vect_tc prepr_tc arr_tc
+ = do
+ arg_ty <- mkPArrayType el_ty
+ rep_tys <- mapM (mapM mkPArrayType) rep_el_tys
+
+ arg <- newLocalVar FSLIT("xs") arg_ty
+ bndrss <- mapM (mapM (newLocalVar FSLIT("ys"))) rep_tys
+ len <- newLocalVar FSLIT("len") intPrimTy
+ sel <- newLocalVar FSLIT("sel") =<< mkPArrayType intTy
+
+ let add_sel xs | has_selector = sel : xs
+ | otherwise = xs
+
+ all_bndrs = len : add_sel (concat bndrss)
+
+ res <- parrayCoerce prepr_tc var_tys
+ =<< mkToArrPRepr (Var len) (Var sel) (map (map Var) bndrss)
+ res_ty <- mkPArrayType =<< mkPReprType el_ty
+
+ return . Lam arg
+ $ Case (unwrapFamInstScrut arr_tc var_tys (Var arg))
+ (mkWildId (mkTyConApp arr_tc var_tys))
+ res_ty
+ [(DataAlt arr_dc, all_bndrs, res)]
+ where
+ var_tys = mkTyVarTys $ tyConTyVars vect_tc
+ el_ty = mkTyConApp vect_tc var_tys
+ data_cons = tyConDataCons vect_tc
+ rep_el_tys = map dataConRepArgTys data_cons
+
+ [arr_dc] = tyConDataCons arr_tc
+
+ has_selector | [_] <- data_cons = False
+ | otherwise = True
+
+
buildFromPRepr :: Shape -> TyCon -> TyCon -> TyCon -> VM CoreExpr
buildFromPRepr _ vect_tc prepr_tc _
= do
bndrs <- mapM (newLocalVar FSLIT("x")) $ dataConRepArgTys dc
return (bndrs, mkConApp dc (map Type var_tys ++ map Var bndrs))
+buildFromArrPRepr :: Shape -> TyCon -> TyCon -> TyCon -> VM CoreExpr
+buildFromArrPRepr _ vect_tc prepr_tc arr_tc
+ = mkFromArrPRepr undefined undefined undefined undefined undefined undefined
+
buildPRDict :: Shape -> TyCon -> TyCon -> TyCon -> VM CoreExpr
buildPRDict _ vect_tc prepr_tc _
= prCoerce prepr_tc var_tys
var <- newLocalVar name (exprType body)
return (var, mkInlineMe body)
-paMethods = [(FSLIT("lengthPA"), buildLengthPA),
- (FSLIT("replicatePA"), buildReplicatePA),
- (FSLIT("toPRepr"), buildToPRepr),
- (FSLIT("fromPRepr"), buildFromPRepr),
- (FSLIT("dictPRepr"), buildPRDict)]
-
-buildLengthPA :: Shape -> TyCon -> TyCon -> TyCon -> VM CoreExpr
-buildLengthPA shape vect_tc _ arr_tc
- = do
- parr_ty <- mkPArrayType (mkTyConApp vect_tc arg_tys)
- arg <- newLocalVar FSLIT("xs") parr_ty
- shapes <- mapM (newLocalVar FSLIT("sh")) shape_tys
- wilds <- mapM newDummyVar repr_tys
- let scrut = unwrapFamInstScrut arr_tc arg_tys (Var arg)
- scrut_ty = exprType scrut
-
- body <- shapeLength shape (map Var shapes)
-
- return . Lam arg
- $ Case scrut (mkWildId scrut_ty) intPrimTy
- [(DataAlt repr_dc, shapes ++ wilds, body)]
- where
- arg_tys = mkTyVarTys $ tyConTyVars arr_tc
- [repr_dc] = tyConDataCons arr_tc
-
- shape_tys = shapeReprTys shape
- repr_tys = drop (length shape_tys) (dataConRepArgTys repr_dc)
-
--- data T = C0 t1 ... tm
--- ...
--- Ck u1 ... un
---
--- data [:T:] = A ![:Int:] [:t1:] ... [:un:]
---
--- replicatePA :: Int# -> T -> [:T:]
--- replicatePA n# t
--- = let c = case t of
--- C0 _ ... _ -> 0
--- ...
--- Ck _ ... _ -> k
---
--- xs1 = case t of
--- C0 x1 _ ... _ -> replicatePA @t1 n# x1
--- _ -> emptyPA @t1
---
--- ...
---
--- ysn = case t of
--- Ck _ ... _ yn -> replicatePA @un n# yn
--- _ -> emptyPA @un
--- in
--- A (replicatePA @Int n# c) xs1 ... ysn
---
---
-
-buildReplicatePA :: Shape -> TyCon -> TyCon -> TyCon -> VM CoreExpr
-buildReplicatePA shape vect_tc _ arr_tc
- = do
- len_var <- newLocalVar FSLIT("n") intPrimTy
- val_var <- newLocalVar FSLIT("x") val_ty
-
- let len = Var len_var
- val = Var val_var
-
- shape_reprs <- shapeReplicate shape len (ctr_num val)
- reprs <- liftM concat $ mapM (mk_comp_arrs len val) vect_dcs
-
- return . mkLams [len_var, val_var]
- . wrapFamInstBody arr_tc arg_tys
- $ mkConApp arr_dc (map Type arg_tys ++ shape_reprs ++ reprs)
- where
- arg_tys = mkTyVarTys (tyConTyVars arr_tc)
- val_ty = mkTyConApp vect_tc arg_tys
- wild = mkWildId val_ty
- vect_dcs = tyConDataCons vect_tc
- [arr_dc] = tyConDataCons arr_tc
-
- ctr_num val = Case val wild intTy (zipWith ctr_num_alt vect_dcs [0..])
- ctr_num_alt dc i = (DataAlt dc, map mkWildId (dataConRepArgTys dc),
- mkConApp intDataCon [mkIntLitInt i])
-
-
- mk_comp_arrs len val dc = let tys = dataConRepArgTys dc
- wilds = map mkWildId tys
- in
- sequence (zipWith3 (mk_comp_arr len val dc)
- tys (inits wilds) (tails wilds))
-
- mk_comp_arr len val dc ty pre (_:post)
- = do
- var <- newLocalVar FSLIT("x") ty
- rep <- replicatePA len (Var var)
- empty <- emptyPA ty
- arr_ty <- mkPArrayType ty
-
- return $ Case val wild arr_ty
- [(DEFAULT, [], empty), (DataAlt dc, pre ++ (var : post), rep)]
+paMethods = [(FSLIT("toPRepr"), buildToPRepr),
+ (FSLIT("fromPRepr"), buildFromPRepr),
+ (FSLIT("toArrPRepr"), buildToArrPRepr),
+ (FSLIT("fromArrPRepr"), buildFromArrPRepr),
+ (FSLIT("dictPRepr"), buildPRDict)]
-- | Split the given tycons into two sets depending on whether they have to be
-- converted (first list) or not (second list). The first argument contains